Dave from Kirkwood on 4/9/2021 10:17:41 AM:
There is lots of information on the website here that should help you with your questions:
1. Safety - see the FAQ link off main page:
https://bikekatytrail.com/katy-trail-faq.aspx
Most people think the trail is very safe, but you might have your own ideas if being in remote areas and camping alone are issues.
2. Sleeping is limited to campgrounds and hotels/B&Bs. There is not really any open camping (or stealth camping) along the trail. See this page for camping options:
https://bikekatytrail.com/katy-trail-camping.aspx
3. I recommend reading the trip reports from other hikers and see how they managed to pull off the challenging feat.
https://bikekatytrail.com/trip-report.aspx
I think the main challenges would be finding camping every night at the right distance (hotels and B&Bs would add more options) and making sure you have access to food and water as needed (stores and restaurants can sometimes be closed, so call ahead for critical needs).